package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.sky.constant.MessageConstant;
import com.sky.dto.UserLoginDTO;
import com.sky.entity.User;
import com.sky.exception.LoginFailedException;
import com.sky.mapper.UserMapper;
import com.sky.properties.WeChatProperties;
import com.sky.service.UserService;
import com.sky.utils.HttpClientUtil;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.HashMap;
import java.util.Map;

@Service
public class UserServiceImpl implements UserService {

    @Autowired
    private WeChatProperties properties;

    @Autowired
    private UserMapper userMapper;

    //微信服务接口地址
    public static final String WX_LOGIN = "https://api.weixin.qq.com/sns/jscode2session";

    private String getopenId(String code){
        Map<String, String> params = new HashMap<String, String>();
        params.put("appid", properties.getAppid());
        params.put("secret", properties.getSecret());
        params.put("grant_type", "authorization_code");
        params.put("js_code", code);
        String json = HttpClientUtil.doGet(WX_LOGIN, params);
        JSONObject jsonObject = JSON.parseObject(json);
        return jsonObject.getString("openid");

    }

    @Override
    public User wxLogin(UserLoginDTO loginDTO) {
        String openid = getopenId(loginDTO.getCode());
        if(openid == null){
            throw new LoginFailedException(MessageConstant.LOGIN_FAILED);
        }
        User user = userMapper.getByOpenId(openid);
        if(user == null){
            user = User.builder()
                    .openid(openid)
                    .createTime(LocalDateTime.now())
                    .build();
            userMapper.insert(user);
        }

        return user;
    }
}
